Deformation mechanisms during large strain deformation of nanocrystalline nickel

Gurao, N. P.; Suwas, Satyam
May 2009
Applied Physics Letters;5/11/2009, Vol. 94 Issue 19, p191902
Academic Journal
In this letter, a conclusive evidence of the operation of planar slip along with grain boundary mediated mechanisms has been reported during large strain deformation of nanocrystalline nickel. Dislocation annihilation mechanism such as mechanical recovery has been found to play an important role during the course of deformation. The evidences rely on x-ray based techniques, such as dislocation density determination and crystallographic texture measurement as well as microstructural observation by electron microscopy. The characteristic texture evolution in this case is an indication of normal slip mediated plasticity in nanocrystalline nickel.


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